Type-writing machine



(No Model.) 3 SheetsSheet 1.

W. CLARK. TYPE WRITING MAGHINE.

No. 519,320. Patented May 8, 189 4.

Attavnya.

THE OGRAFUING COMPANY wAsHmaYoN. a. a.

(-No Model.) 3 sheets -sheet 2.

. W. CLARK.

TYPE-WRITING- MACHINE.

Y No. 519,320. V PatentedMays, I894.

' (No Model.) 3 Sheets-Sheet 3. k W CLARK TYPE WRITING MACHINE.

' No. 519,320. Patented May 8, 1894.

WILLIAMOLARK, on GREENFIELD,WISCONSINQ TYPE-WRITING MACHINE.

SPECIFIGATION forming part of Letters Patent No. 519,320,dated May 8, 1894. p

. Application filed April 16, 1892.

To all whom it may concern. 1

Be it known thatLWILLIAM CLARK, of North Greenfield, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Variable-Spacing Mechanism for Type Writing Machines; and I do hereby declare that the following is a full, clear,and exact description of the invention, which will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, and to the letters of refer once marked thereon, which form a part of this specification.

The main objects of my invention are to i make the spaces between the several characters in typewritten work correspond with the various widths of the charactersand thereby avoid the distortion of the characters which is necessary to adapt them to a uniform spacing, thereby improving the appearance of typewritten work, and to permit of theemployment of logotypes for short, frequently occurring words and combinations of characters, thus increasing the efficiency and speed of the typewriter.

It consists essentially of the combination with the fixed and slip racks of the papercarriage, of a variable stop connected and movable therewith and arranged to limit themovement of the slip rack with reference 'to the fixed rack, a rock shaft parallel with said plied. Fig.2 is a detail onan enlarged scale in perspective of the graduated stop and its immediate connections. Fig. 3 is a side elevation on an enlarged scale of the stop, a key lever and their connections and associated parts. Fig.4 is a detail view of a modifica- Serial No. 429.426. (No model.)

tion of the stop. Fig. 5 is a perspective view of another modification of the device. Fig. 6 is an inverted plan view of still another modification. Fig. 7 is a perspective view of another modification, and Fig. 8 is an inverted plan view of still another modification of the stop. I

For the purpose of illustration I have shown my improvements as applied to a typewriting machine of the class known as Caligraphs.

Referring to Fig. 1, in connection with Figs.

2 and .3, A represents the frame of the machine, B the paper carriage, O the fixed rack, D the slip rack in connection with the carriage, e the letter space dog in connection with the vibrating dog frame E, F the type levers, G the key levers connected by rods g, with the type levers, all of the usual well known construction, except that for the purpose of adaptation for use with myimprovements theracks are provided with twice as many teeth as heretofore.

It will be understood by those familiar with typewriting. machines, that the letter space dog 6 engages normally with the slip rack D, and that said rack is held by it in its extreme right position (with reference to the operator). When one of thekey levers G is depressed, it operates through the frame E to move the dog e forward into engagement withithe fixed rack G and out of engagement with the slip rack D. As soon as disengaged, the latter is moved upon the fixed rack by the spring (I as far as it is permitted to go. When the actuating key lever is released, the dog 6 is withdrawn by a-spring (not shown) rack D and outof engagement with the fixed rack C. When the dog leaves the fixed rack O the paper carriage is free to be advanced by the usual feeding device (not shown) an interval equal to the distance which the slip rack D has just previously moved with reference to the fixed rack. y

H is a graduated stop wheel bearing upon a screw or stud fixed to the slip rack D and arranged to engage with a projection h on the fixed rack C so as to limit the movement of the slip rack upon the fixed rack, as hereinafter explained. i

Kis a squared, splined or feathered rock back again into engagemen-twith the slip ICC shaft supported horizontally at the rear up- -,tached to the frame of the machine.

per side of the machine parallel with the racks O and D in bearings in brackets 7c leat- Upon this rock shaft is mounted a segment of a crown gear I, which is free to move lengthwise of said shaft, but is compelled to turn therewith. It meshes with a pinion 1', fixed to-and concentric with the stop wheel H, andis caused to move synchronously with the slip rack D in engagement with said pinion by an arm cl attached to said slip rack and engaging with a groove in the hub of said gear.

The rock shaft K is provided at or near its ends with arms 70 70' which are connected by rods 70 k with a horizontal graduated bar L, placed underneath the key levers G and provided on its upper edge with projections corresponding with the spaces required for the characters which are printed by the operation of the adjacent key levers. The connecting rods k and the graduated bar L are guided and held in place by keepers is through which said connecting rods loosely pass on the frame A. After being turned by the depression of a key lever, the rock shaft K is returned to its normal position by a spring 76*. The depression of a type lever G, under which is located a projection on the graduated bar L, operates through said bar and its connections to turn the rock shaft K, and through the gear I and pinion 't', to correspondingly'turn the stop wheel H, different parts of the periphery of which are thus brought opposite the projection h on fixed rack C. By forming the stop wheel with indentations or projections upon its periphery at intervals corresponding with the distance it is turned by the depression of the keys of the several characters, the movement of the slip rack D upon the fixed rack O is limited according to the spacing desired'for the characters of different widths. Inasmuch as the characters of medium width are of most frequent occurrence, I construct and set the stop wheel H in its normal position to permit the slip rack to move upon the fixed rack a dis tance corresponding with two rack teeth. For characters of half the width and requiring half the space, the wheel is turned to bring a portion of its periphery opposite the projection 71, sotas to permit the slip rack to move upon the fixed rack an interval corresponding with one rack tooth; and for characters of greater width the stop wheel is moved into a position as hereinbefore explained, to permit the slip rack to move an interval corresponding with three or more rack teeth. By this arrange ment the stop mechanism is not brought into action by the operation of quite a number of characters, such as require a space correspondlng with two rack teeth, and is shifted only when the key lever of a character re- .quiring a wider or narrower space is depressed; as satisfactory results may be secured by making the characters of three different widths, the stop mechanism need the slip rack, is connected not necessarily be shifted with great fre quency.

The stop itself and its connection with the rock shaft K by which the free movement of the carriage is permitted, may be variously modified within the intended scope of my invention. The s op wheel shown in Figs. 1 and 2 is designed for eight variations in spacing. When a lesser number is employed a segment H, having the required number of recesses or notches in its periphery, may be substituted as shown in Fig. 4, in place of the full wheel H; or in place of the stop wheel and projection h, I may employ an arm M, mounted upon the rock shaft K, as shown in Fig. 5, and caused to move lengthwise upon said shaft with the fixed rack O, by an arm 0, attached thereto and engaging with an annular groove in the hub of said arm. In con nection with this. arm I form the slip rack D with a vertical slot m, having lateral offsets m. of different depths, according to the spacing desired. The arm M, projecting into this slot, when moved vertically opposite the offsets m, permits a greater or less movement of the slip rack D on the fixed rack, according to the depth of the offset which is oppo-.

site the arm. The fixed rack C may be formed with a vertical slot to receive the end of the arm M, and thearm 0 may be dispensed with, although I prefer to use it, inasmuch as the arm M will be less liable to bind upon the rock shaft tlianif it is moved in unison with the rack 0 simply by engagement with the vertical slot therein.

Referring to Fig. 6, showing another modification of the stop, N is a cylinder mounted in bearings attached to the slip rack D, and formed in its periphery with a series of steps adapted to engage with the projection h from the fixed rack O. This stop cylinder is operated from the rock shaft K by a segment gear H meshing with a pinion n, on the shaft of the cylinder, and the gearis caused to move lengthwise of the shaft K simultaneously with the slip rack D, in engagement With the pinion 12, by an arm 01 like or similar to that shown in Figs. 1 and 2, in connection with thegearI. 'Ihestopcylindermaybe mounted directly upon the rock shaft K, and the intermediate gear dispensed with, as shown in Fig. 8, in which it is designated N and connected with the slip rack D by an arm (1 attached to said rack and engaging an annular groove in the hub of said cylinder.

Referring to Fig. 7, showing still another modification of the stop, 0 is a vertically movable slide mounted on the slip rack D and formed in one edge with notches of various depths, which are designed to be moved opposite the projection h on the fixed rack 0, according to the spacing required. An arm P mounted upon the rock shaft K and movable lengthwise thereof, synchronously with at its free end by a link 13 with said slide. An arm d similar to those shown in the other figures of the ICC spacing key or keys, two additional spacing keys and key leversG G, as shown in Fig.

1, one at each side of the machine, having connections with the letter space dog and with the variable stop mechanism, like the type keys and key levers hereinbefore described, one spacing key being arranged to make spaces corresponding with three rack teeth and the other to make spaces corresponding with one rack tooth.

Obviously graduated projections g g may be applied to the key levers instead of to the bar L, and to avoid accurate fitting they may be made adjustable.

It will be observed that in the several modifications of the device herein shown and described, the gears I and H the arms M and P and the cylinder N are all loosely mounted and slide endwise upon the shaft K, and are in effect vibrating arms which are connected with or constitute the shifting member of the variable stop. r i

I claim- 1. In a typewriting machine the combination with the fixed and slip racks of the paper carriage and the letter space dog, of a stop comprising a stationary and a movable member arrangedtolimit the movement of one rack upon the other, arock shaft arranged to be turned more or less by the depression of the key levers and a rocking arm mounted upon and movable endwise of said rock shaft and connected with or constituting the movable member of said stop, substantially as j and for the purposes set forth. j

2. In a typewriting machine the combination with the fixed and slip racks of the paper carriage and the letter space dog, of a rock shaft adjacent to and parallel with said racks, a bar located undern eat-h, adjacent, and crosswise to the keylevers and connected by rods.

with arms mounted on said rock shaft,and a variable stop comprising two members, one

of which has a constant sliding connection with said rock shaft and a connection with one of said racks whereby it is caused to advance simultaneously therewith, the other 1 member being connected and movable with the other rack, substantially asand for the purposes set forth. 3. In a typewriting machinenthe combination with the fixed and slip racks ofthe paper carriage and the letter space dog, of a variable stop comprising a graduated member mounted upon and movable with the slip rack and adapted to engage with a projection con stituting the other member which is attached to the fixed rack, so as to permit of a greater or less movement of the sliprack with reference to the fixed rack, and a rock shaft adjacent to and parallel with said racks having connections whereby the depression of the key levers of certain characters will turn it more or less, the graduated member of said stop having a constant sliding connection with said rock shaft whereby it is shifted by the depression of the key levers transversely to the movement of the slip rack, and a greater or less advance movement of the paper carriage is permitted, substantially as and for the purposes set forth.

4. In a typewriting machine the combination with the fixed and slip racks of the paper carriage and the letter i space dog, of a stop wheel revolubly mounted upon and movable with the slip rack and having a series of notches of varying'depth which are arranged to be turned opposite aprojection on the fixed rack so as to variably limit the movement of the slip rack thereon, and a rock shaft with which said stop wheel has a sliding connectionadjacent to and parallel with said racks.

5. In a typewriting machine, the combination with the fixed and slip racks of the paper carriage, the letterspace dog and the key levers, of a graduated bar placed underneath said key levers and having its greater projections adjacent to the key levers of characters of greater width, arock shaftadjacent to and parallel with said racks, and having one or more rocking arms connected with said graduated bar, and a stop for variably limiting the movement of said slip rack upon the fixed rack, having a constant sliding connection with said rock shaft and a connection with one of said racks whereby it is caused to advance therewith, substantially as and for the purposes set forth.

6. In a typewriting machine, the combination with the fixed and slip racks of the paper carriage and the letter space dog, of :a stop wheel mounted upon the slip rack and having a series of notches or steps in its periphery which are adapted to engage with a projection on the fixed rack and limit the advance movement of the slip rack thereon at different points, a rock shaft adjacent to and parallel with said racks having connections by which it is turned more or less by the depression of the key levers of characters of different widths, and a gear having asliding connection with said rock shaft and connected with ICC the movable rack so as to be advanced therewheel, substantially as and for the purposes set forth.

7. Ina typewriting machine, the combination with the fixed and slip racks and the letter space dog, of a stop wheel having graduated notches or steps mountedupon the slip rack and adapted to engage with a projection on the fixed rack and limit the advanceof the slip rack thereon at different points, a

rock shaft connected with a graduated bar lot cated adjacent to and underneath the key levers, a gear engaging with a pinion on the stop wheel and mounted upon and having a sliding connection with said rock shaft, and an arm fixed to said movable rack and engaging with an annular groove in the hub of said gear, substantially as and for the purrock shaft, substantially as and the purposes poses set forth.

8. In a typewriting machine, the combination with the fixed and slip racks of the paper carriage and the letter space dog, of a rock shaft adjacent to and parallel with said racks, operated by the key levers, and a stop wheel adapted to variably limit the movement of the slip rack upon the fixed rack, and hav- [0 ing a constant sliding connection with said set forth. I

In testimony that" I claim the foregoing as my own Iaffix my signatn re in presence of tWo Witnesses.

WILLIAM CLARK.

Witnesses:

OHAs. L. Goss, FRANK A. KREHLO. 

